Back scratcher



FIG. 1 is a side elevational view thereof of a back scratcher embodying my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a back scratcher, as shown. 